Current information is insufficient to permit a conclusion as to the cause of the event.Review of device history records show the lot released with no recorded anomaly or deviation.Date of event ¿ unknown date in (b)(6) of 2016.Date explanted ¿ unknown date in (b)(6) of 2016.There are warnings in the package insert that state that this type of event can occur: under possible adverse effects, number 10 states, "fatigue fracture of component can occur as a result of loss of fixation, strenuous activity, malalignment, trauma, non-union, or excessive weight.".
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